Constraints on rapidity-dependent initial conditions from charged particle pseudorapidity densities and correlations at the LHC

2017 ◽  
Vol 289-290 ◽  
pp. 483-486
Author(s):  
Weiyao Ke ◽  
J. Scott Moreland ◽  
Jonah E. Bernhard ◽  
Steffen A. Bass
Keyword(s):  
Charged Particle ◽  
Initial Conditions

scholarly journals Factor Fluctuation in Super Short Avalanche Electron Propagation

2018 ◽  
Vol 3 (12) ◽  
pp. 74-77
Author(s):  
Omar Rodriguez Pinilla ◽  
Fernando Díaz Ortiz ◽  
Carlos Gómez ◽  
Mikel F Hurtado M
Keyword(s):  
Charged Particle ◽  
Runaway Electron ◽  
Initial Conditions ◽  
Theoretical Models ◽  
Perturbation Series ◽  
Feynman Integrals ◽  
First Results ◽  
Supershort Avalanche Electron Beam ◽  
Electron Avalanches ◽  
Future Work

Compact Intracloud Discharges (CID) and most of Transient Luminous Events (TLE) are two known microsecond-pulse discharges related to electrical activity of thunderclouds. However, their nature and relationship with other cloud discharges still unclear. Few theoretical models had been proposed to explain the nature of this phenomenon. Some proposed models involved the effects of runaway electron avalanches (REA) and relativistic runaway electron avalanches (RREA) as essential part of the aforementioned discharges. In this work, an initial stage is done to propose new models to explain behavior of CID and TLE. Thus, it is simulated the propagation of a charged particle for a short distance, emulating a supershort avalanche electron beam (SAEB). Specifically, first results presented come from simulating the displacement of a charged particle and finding its fluctuation factor by means of perturbations theory. Other works on this issue has been done using different approaches namely, Feynman integrals with similar outcomes. Perturbation theory is used because in order to allow a future interaction in the model among particles, the terms of the perturbation series can be manipulated using Feynman diagrams. Initial conditions assumed for this work are: unit cell, anisotropic volume and N molecules inside the volume with no interaction. Three relevant conclusions can be exposed from the results, the simulation is coherent with the obtained results using Feynman integrals approach and the equations make possible to predict the amount of photons generated during the avalanche. Finally, it is possible to model charged particle generation through annihilation of variations of electric potential. Future work includes update the model to consider the interaction among molecules and perform experimental validation of the proposed model.

Critical Examination of a Proposed Charged-Particle Stern–Gerlach Experiment

1972 ◽  
Vol 50 (3) ◽  
pp. 185-195
Author(s):  
Thomas F. Knott
Keyword(s):  
Magnetic Field ◽  
Charged Particle ◽  
Phase Space ◽  
Initial Phase ◽  
Initial Conditions ◽  
Transverse Velocity ◽  
Charged Particles ◽  
Transverse Magnetic ◽  
Critical Examination ◽  
Focusing Effect

It has been proposed by Enga and Bloom that combined electric and magnetic helical quadrupole fields may be used to perform a Stern–Gerlach experiment on charged particles. A detailed investigation shows that the longitudinal Lorentz force due to coupling of the transverse velocity of the particles to the transverse magnetic field produces an additional focusing effect which masks the Stern–Gerlach force in large regions of initial phase space. Consideration of uncompensated magnetic fields, produced by small random variations in conductor dimensions and location, shows that the tolerances required to preserve spin separation in the useful range of initial conditions are several orders of magnitude higher than can be achieved at this time.

CHARGED PARTICLE RAPIDITY DISTRIBUTION, TRANSVERSE MOMENTUM DISTRIBUTION AND ELLIPTIC FLOW IN Cu+Cu COLLISIONS AT RHIC WITH NeXSPheRIO

2007 ◽  
Vol 16 (09) ◽  
pp. 2970-2973 ◽  
Author(s):  
A. L. V. R. DOS REIS ◽  
F. GRASSI ◽  
R. P. G. DE ANDRADE ◽  
Y. HAMA ◽  
F. S. NAVARRA
Keyword(s):  
Charged Particle ◽  
Transverse Momentum ◽  
Smoothed Particle Hydrodynamics ◽  
Initial Conditions ◽  
Transverse Momentum Distribution ◽  
Ion Collisions ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Numerical Program ◽  
Hydrodynamics Equations

In this work we use the program SPheRIO1 (Smoothed Particle hydrodynamics evolution of Relativistic Ion collisions) to simulate the collision between two copper nuclei at 200 A GeV. SPheRIO is a numerical program that solves the hydrodynamics equations. We use the initial conditions provided by the program NeXus.2.

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